https://www.dlsite.com/girls/work/=/product_id/RJ01101140.html
As always, please support the artist and buy his works.
This one is translated to english!

This is sex, isn't i!t! No, it's training!

* I lied. It is SEX.
The protagonist "Mahiru Mochizuki" was exercising alone to lose weight.
That's when she caught a glance of a gym that had recently become the talk of the town.

Mahiru thought it would be great to be able to use the gym, but had given up on doing so for financial reasons. But then a man named Yusei Aoki, who claims to be the owner of the gym, appears before her.

He asks her if she would like to train for free in exchange for information about her body... and she accepts his tempting offer.
But, she finds that the "training" she's getting is all very naughty in nature?!

Massage, nipple teasing through cloth, sex toys, clitoral and portio (cervix) stimulation, kissing, and more!

55 total pages (including 1 cover, 50 main pages, and 1 illustration)

Characters:

-Mahiru Mochizuki
28 years old.
The protagonist who wishes to diet.
Is a bit of a push over and loves to eat.

-Yuusei Aoki
The owner of a training gym.
Of all the fish in the sea, for some reason he chose Mahiru.
... Does he have some kind of plan in mind?

Is that ?... Is that heterosexual hentai for girls ?
The "fat" character is a girl ( although absolutely loveable, far from the worst "ugly bastard" i have seen ), the whole thing scream "shojo", the very hot guy is a bit forceful but ultimately just went the girl to be "her" ( not loosing weight ) and is absolutely in love with her.

What a rare sight !

Base +6, Gabs999 +6, Fofotron +8, gaarahugger +6, aquariada +3, Und3adgam3r +7, Bret2211 +6, geg220 +7, bipwaccubus -1, brawny forest +4

I'm here to see the fat chick, so I think it's still meant for guys.

Base +8, coleix +6, wickerKing +5, VoidStar46 +6, qawzsexdrcft +5, Joseph Gomes +6

finally, a hentai to fulfill my dream of fucking the fat canteen lady

Base +6, wickerKing +5

奇怪而且毫无美感，不过支持

Base +3, Bane46 -4, yxzy -4